The 1991 World Seniors Championship was a professional snooker tournament that took place from 18 to 22 September 1991 at Trentham Gardens in Stoke-on-Trent, England. It was contested by sixteen players aged 40 or more, including several former World Snooker Champions and was the first staging of the World Seniors Championship. The event was promoted by Barry Hearn and sanctioned by the World Professional Billiards and Snooker Association.